Sort of working flatpak manifesto for gtg master

GTG_master.flatpak

{
  "app-id": "org.gnome.GTG",
  "runtime": "org.gnome.Sdk",
  "runtime-version": "3.36",
  "sdk": "org.gnome.Sdk",
  "command": "gtg",
  "finish-args": [
    "--share=ipc",
    "--socket=fallback-x11",
    "--socket=wayland",
    "--share=network",
    "--system-talk-name=org.freedesktop.login1",
    "--own-name=org.gnome.GTG*"
  ],
  "cleanup": [
    "/include",
    "/lib/pkgconfig",
    "/share/pkgconfig",
    "/share/aclocal",
    "/man",
    "/share/man",
    "/share/gtk-doc",
    "/share/vala",
    "*.la",
    "*.a",
    "*.pyc",
    "*.pyo"
  ],
  "modules": [{
      "name": "python-dbus",

      "buildsystem": "simple",
      "build-commands": [
        "pip3 install --no-index --find-links=\"file://${PWD}\" --prefix=${FLATPAK_DEST} dbus-python"
      ],
      "sources": [{
        "type": "file",
        "url": "https://files.pythonhosted.org/packages/3f/e7/4edb582d1ffd5ac3c84188deea32e960b5c8c0fe1da56ce70224f85ce542/dbus-python-1.2.8.tar.gz",
        "sha256": "abf12bbb765e300bf8e2a1b2f32f85949eab06998dbda127952c31cb63957b6f"
      }]
    },
    {
      "name": "python3-pyxdg",
      "buildsystem": "simple",
      "build-commands": [
        "pip3 install --no-index --find-links=\"file://${PWD}\" --prefix=${FLATPAK_DEST} pyxdg"
      ],
      "sources": [{
        "type": "file",
        "url": "https://files.pythonhosted.org/packages/47/6e/311d5f22e2b76381719b5d0c6e9dc39cd33999adae67db71d7279a6d70f4/pyxdg-0.26.tar.gz",
        "sha256": "fe2928d3f532ed32b39c32a482b54136fe766d19936afc96c8f00645f9da1a06"
      }]
    },
    {
      "name": "liblarch",
      "buildsystem": "simple",
      "build-commands": [
        "python3 setup.py install --prefix /app"
      ],
      "sources": [{
        "type": "git",
        "url": "https://github.com/getting-things-gnome/liblarch"
      }]
    },
    {
      "name": "gtg",
      "buildsystem": "simple",
      "build-commands": [
        "python3 setup.py install --prefix /app"
      ],
      "sources": [{
        "type": "git",
        "url": "https://github.com/getting-things-gnome/gtg"
      }
      ]
    }
  ]
}